- Impact! Signs Chicago
 - Chicago - Makes and installs architectural signs, banners, vehicle graphics, neon and LED signs, and corporate and retail signage. - Signature Graphics
- Porter - Specialises in 3M Scotchprint and screen printed fleet graphics, decals, and lettering. Manufactures and installs vinyl vehicle markings and wraps.
- Western Remac
- Cicero - Sells signage products, from concept and design to manufacturing and installation.
- Graphicsland
- Tinley Park - Interactively design and order signs, banners, and posters online.
- Nelson-Harkins Industries
- Chicago - Manufacturer of directories and bulletin boards.
- Corporate Image of Illinois
- Arlington Heights - Specialising in custom office reception wall lettering and signs.
- Flag-Master
- Arlington Heights - Supplier and distributor of custom and stock flags, banners, pennants, and other display solutions.
- SignOne
- Evanston - Provides signs for all occasions.
- BW Industries
- Lombard - Specialising in computerized engraving and printing.
- Econo Signs
- Oak Lawn - Professional computerized sign shop specialising in vinyl lettering, magnetics, banners, and graphics.
- Alphabet Shop, The
- Elgin - Sign shop specialising in dimensional letters and logos, vinyl letters and logos, ADA signs, engraved signs, and silkscreens.
- Bannerville USA
- Western Springs - Prints custom and stock banners specialising in 4 colour process printing.
- Vital Signs
- Elmhurst - Offering interior and exterior signs as well as graphic services.
- CM Associates, Inc.
- Tinley Park - Making labels, nameplates, decals, and faceplates for OEM manufacturers.
- Wright Advertising Corp.
- Cicero - Specialises in bench, auto, and outdoor signage.
- Dahlstrom Display Inc. (DDI)
- Chicago - Manufacturer of large format signs.
- Landmark Sign Corporation
- Chesterton - Custom electric and non-electric signage. Site includes picture gallery, education section, and virtual tour.
- Specialty Graphics Supply
- Chicago - Specialising in sign vinyl cutters/plotters, heat transfer presses, vinyl graphic films, and other sign and graphic supplies.
- Materiel Graphics
- Chicago - Making signs from wood, metal, or plastic.
- Behold! Signs and Graphic Solutions
- Midlothian - Offering signs, banners, posters, decals trade show exhibits, vehicle graphics, and t-shirts for retail, food, education, art, and music businesses.
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